Fire retardant polymer containing octachlorocyclopentene

ABSTRACT

The transparency, gloss and resistance to burning of polymers is improved when the polymer contains octachlorocyclopentene (OCCP).

United States Patent 1191 I I a .11 1, 3,821,159

Mowdood June 28, 1974 [54] FIRE RETARDANT POLYMER 2,786,062 3/1957 Vollmann 260/3l4.5 CONTAINING 2,900,420 8/1959 Lidoy 260/648 3,004,935 10/1961 Raley, Jr. et al 260/2.5 OCTACHLOROCYCLOPENTENE 3,372,141 3/1968 Dickerson et al.... 260/45.95 [75] Inventor: Syed K. Mowdood, Akron, Ohio 3,392,136 7/1968 Hindersinn et a1. 260/31.8 3,422,047 1/1969 Cannelongo 260/28.5 Asslgneel The Goodyear Tire & Rubber 3,523,986 8/1970 Bingham 260/92.8

, Company, Akron, Ohio [22] Filed: Dec. 2, 1971 Primary ExaminerDonald E. Czaja Assistant ExaminerR. A. White [211 App! 204359 v Attorney, Agent, or Firm-F. W. Brunner; J. P. Ward;

V. G. Parker [52] U.S. Cl. 260/45.7 R, 260/87.5 R, 260/92.8 W [51] Int. Cl C09k 3/28 [58] Field of Search 260/45.7 R, 92.8 W [57] ABSTRACT The transparency, gloss and resistance to burning of 5 References Cited polymers is improved when the polymer contains octa- UNITED STATES PATENTS chlorocyclopentene (OCCP).

2,741,639 4/1956 Kleiman 260/648 3 Claims, N0 Drawings FIRE RETARDANT POLYMER CONTAINING In the table an improvement in gloss, haze, light I transmission and resistance to burning was'observed I for both Examples 1 and 2 when compared to the con- Thls lnvemloh relates to lmProvmg the trahspareheyr trol. A flame retardancy of 4 represents a condition gloss h Teslstahee to bummg f Polymers P 5 where the resin supports a flame as long as the ignition y y Polymers through use of oetachloro' source is being applied to the resin. Values of l and 2 y p h e e eltheh to the P y or represent proportionately better flame retardancy for present in the polymerization reaction during the for- Examples 2 and 1 respectivdy math)" of the Polymeh The improvement of this invention is applicable to The following examples l illustrative the Present those monomeric materials which contain a single invention, all amounts are in parts by weight per 100 thyl ne group attached to a carbon atom by a dou- Parts of monomer' ble bond; that is, compounds which contain a single EXAMPLE 1 The following formulation was used in making the improved polymer of this invention wherein G is gengroup, and particularly a single CH =CH- group. The

eral and P is preferred. most important class of such mater als consists of Ingredients Amount Used Range 1. Vinylchloride (polymerizable monomer) I00 I00 2. Suspending agent 'Methocel 60 Hg 50 (methyl cellulose) .16 .140 3. Initiator t-butyl peroxypivalate (757: in mineral spirits) .15. .0l-5.0 4. Reaction medium water (distilled) 200 I00-300 5. Modifier octochlorocyclopentene (OCCP) l.O .l2.5 C

.58- P Conditions 6. Temperature C. 60C. 49-7lC. 7. Pressure psi 138 psi 90-180 psi 8. Agitation one propeller stirring downward at rpm plus baffles 470 rpm 200-500 rpm A conventional glass-lined pressure vessel equipped monomers containing a single olefinic double bond with external heating and cooling means is first evacupresent in a ated and then charged with the water containing the 'I A dispersing agent, to which water is then charged the ini- CHFC tiator, modifier and the polymerizable monomer. The

O I o 0 :g2 ;i;g? a g g gs gag group, in which the second carbon atom is attached by at least one of the free valences to an electronegative obmm good reaction rate 40 group, that is, a group which increases substantially the polar characteristics of the molecule. Among such EXAMPLE 2 monomers are the vinyl aromatics, such as styrene, p-

ln this example the OCC P modifier was added to the chlorostyrene; esters of alphamethylene aliphatic control resin and, after thorough blending, processed monocarboxylic acids, such as methyl acrylate, ethyl into a thin sheet on a calender equipped with mirror acrylate, n-butylacrylate, isobutylacrylate, dodecyl acsmooth calender rolls and then tested for transparency, rylate, 2-chloroethyl acrylate, 2-chloropropyl acrylate, resistance to burning and appearance. The control 2,2'-dichlorisopropyl acrylate, phenyl acrylate, cycloresin was made by the formulation of Example 1 withhexyl acrylate, methyl alpha-chloroacrylate, methyl out the addition of the OCCP. The polyvinyl chloride methacrylate, ethyl methacrylate, methyl ethacrylate;

produced in Examples 1 and 2 had the properties reacrylonitrile; methacrylonitrile; acrylamide; vinyl es-' ported in the following table. v ters, such as vinyl acetate, vinyl chloroacetate, vinyl TABLE Ex. l Ex. 2 PVC OCCP PVC OCCP (added during (added to 5. Rating (flame retardancy 4 2 l 3 propionate, vinyl butyrate; vinyl halides, such as vinyl chloride or vinyl bromide; vinyl ethers, such as vinyl methyl ether, vinyl isobutyl ether, vinyl 2-chlorethyl ether; vinyl ketones, such as vinyl methyl ketone, vinyl hexyl ketone, methyl isopropenyl ketone; isobutylene; vinylidene halides, such as vinylidene chloride, vinylidene chlorofluoride; N-vinyl compounds, such as N- vinyl pyrrole, N-vinyl carbazole, N-vinyl indole, N- vinyl succinimide; and other similar polymerizable materials. The method of this invention is also applicable to the copolymerization of mixtures of two or more of these monomeric materials.

Any suitable dispersing agent may be used in this invention, such as sodium stearate, sodium oleate, ammonium oleate, potassium palmitate, sodium myristate, rosin or dehydrogenated rosin soaps, gelatin, soluble starch, gum tragacanth, gum acacia, water soluble glycol cellulose, sodium alginate, agar agar, glue, Turkey red oil, the sodium salts of alkyl substituted naphthalene sulfonic acids, the sodium salts of reaction products of fatty acids of high molecular weight, and hydroxy substituted or amino substituted alkyl sulfonic acids. These dispersing agents may be used in concentrations ranging from 0.1 to 3 percent of the monomer present and the most economical amounts are those employing sufficient dispersing agent to bring about the most desirable dispersion of the monomer in the water phase. The OCCP can also be used in mass polymerization to yield polymers of good fire resistance and clarity.

Any suitable polymerization initiator may be used in this invention including those containing a peroxy linkage as the acyl peroxides, e.g., dibenzoyl peroxide, benzoylacetyl peroxide. diacetyl peroxide, benzoyl peroxide, dilauryl peroxide, di-tertiary butyl peroxide, acetyl 4 benzoyl peroxide, tertiary vbutyl hydroperoxide, cumene hydroperoxide, lauroyl peroxide, hydrogen peroxide, preformed and in-situ formed peroxydicarbonates of the general formula where R and R are organic radicals including methyl, ethyl, isopropyl, normal propyl, isobutyl, n-butyl, lauryl, amyl, hexyl, nonyl, etc. as well as salts of nonmetallic peracids as ammonium persulfate, potassium persulfate and sodium persulfate. Initiator activators such as sodium bisulfite and bufferssuch as sodium phosphate may also be used.

While certain representative embodiments and de tails have been shown for the purpose of illustrating the invention, it will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from the spirit or scope of the invention.

What is claimed is:

l. A polymer, resulting from the polymerization of a monomer containing a methylene group attached to a carbon atom by a double bond, containing octachlorocyclopentene in an amount ranging from 0.1 to 2.5 parts by weight per parts by weight of said polymer.

2. The polymer of claim 1 wherein the polymer is polyvinyl chloride.

' 3. The polymer of claim 2 wherein the octachlorocyclopentene is present in an amount of 1 part per 100 parts of polymer. 

2. The polymer of claim 1 wherein the polymer is polyvinyl chloride.
 3. The polymer of claim 2 wherein the octachlorocyclopentene is present in an amount of 1 part per 100 parts of polymer. 